SE7906906L - POLYURETHANE COMPOSITION - Google Patents

Abstract

1413761 Polyurethanes DOW CHEMICAL CO 22 Jan 1973 [28 Jan 1972] 3116/73 Heading C3R Rigid, rapid-setting, solid polyurethane compositions are prepared by reacting a mixture comprising: (A) an anionic or amineinitiated polyol having an OH equivalent weight of 50 to less than 250; (B) an organic polyisocyanate containing an aromatic ring and (C) a liquid having a b.p. above 150‹ C. which is (i) an optionally hydroxyl-containing polyoxyalkylene compound, (ii) an ester-modified polyoxyalkylene compound (iii) an organic phosphate, phosphite or phosphonate, (iv) a cyclic polyether, (v) an aromatic compound, (vi) a partially hydrogenated aromatic compound, (vii) an organic carbonate, (viii) a chlorinated aliphatic compound, (ix) a cyclic sulphone or (x) an ester of a carboxylic acid, or a eutectic mixture of two or more compounds from these classes which mixture has a b.p. above 150‹ C., components (A) and (B) being present such that the NCO : OH ratio is 0À8 to 1À5 and component (C) being employed in an amount of 5 to 60% of the combined weight of (A), (B) and (C). In examples component (A) is a propylene oxide adduct of aminoethylethanolamine or diethylene triamine or is triethanolamine, component (B) is toluene diisocyanate, a dimerized diphenylmethane diisocyanate, polymethylene polyphenylisocyanate or a prepolymer from toluene diisocyanate and a glycerol/ propylene oxide adduct and component (C) is trichlorobenzene, a glycerol/propylene oxide reaction product, dioctylphthalate, a mixture of aromatic compounds containing polyethylbenzenes, diphenylether, a liquid chlorinated paraffin or ethylacetoacetate. Numerous other examples of component (C) are listed. Articles may be prepared by casting the polyurethane compositions.

Claims (1)

PATENT REQUIREMENTS Rigid, quick-curing, solid polyurethane product with a density of at least 1 g / cm3 suitable, for example, as a casting material for the production of bearing surfaces, annular intermediate washers, game parts, decorative articles, furniture or furniture components, gears or other machine parts or threaded protective parts, characterized in that the resultant mixture of the components comprises comprises a. an ammonia- or amine-initiated polyether polyol having an OH equivalent weight of from 50 to less than 250; b. an organic polyisocyanate son containing an aromatic ring and c. a liquid modifier compound having a boiling point above 1 ° C corn is selected from organic phosphates, organic phosphites and organic phosphonates, used in components (A) and (B) present in such amounts. that the NC0: 08 ratio Sr from 0.8 to 1.5 and component (C) were used in a mango of 5-608 of the total, acto of the comporoasters (A), (B) and (C).